Why? I fear needing to ask meaningful questions, and / or respond with meaningful answers, as a public display of my networking power.
Eg, if i was asked a question about development, maybe with a tool i'm not too familiar with, i now have to go "on record" explaining what little i know about the tool, just to form a relationship i might want. Sure, that person may be most interested in that tool, but i'm sure i can fit "their needs" for many other aspects, just maybe not that one tool, and not at this time.
How permanent are these Q:A things? What if i learn said tool, do i re-answer? What if i want to revise any inaccuracies i post? From the description, this seems more important than a normal forum (eg: Stackoverflow).
I'm probably wrong on the concept, as i have only watched the video, but i figure even if i am wrong it might help explain confusions i took from the video.